The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 10mm F2.8 EX DC HSM Fisheye and the Rokinon 8mm f2.8 Fisheye for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Sigma 10mm F2.8 EX DC HSM Fisheye is the longer of the two lenses at 83mm. The Rokinon 8mm f2.8 Fisheye with a length of 77mm, is 6mm shorter. Besides being longer, the Sigma 10mm F2.8 EX DC HSM Fisheye also has a larger diameter of 76mm compared to the Rokinon 8mm f2.8 Fisheye's 75mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Rokinon 8mm f2.8 Fisheye weighs 443g, 6% (32g) lighter than the Sigma 10mm F2.8 EX DC HSM Fisheye's weight of 475g.
Lens Mounts
The Sigma 10mm F2.8 EX DC HSM Fisheye has the Canon EF lens mount whereas the Rokinon 8mm f2.8 Fisheye has the Fujifilm X lens mount. Some of the latest released cameras that are compatible with these mounts are Canon T8i, Canon 90D and Canon SL3 for the Canon EF Mount and Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
Sigma 10mm F2.8 EX DC HSM Fisheye is also available in the Sigma SA and Nikon F (DX) mounts.
Focal Range
Sigma 10mm F2.8 EX DC HSM Fisheye is a prime lens with fixed focal lenght of 10mm which has an effective (full-frame 35mm equivalent) focal range of
16mm when used on a APS-C / DX format camera.
On the other hand, the Rokinon 8mm f2.8 Fisheye is a prime lens with fixed focal lenght of 8mm which has an effective (full-frame 35mm equivalent) focal range of 12mm when used on a APS-C / DX format camera.
